 Don't generate new ssh key for each box because it will be override by coreos' update-ssh-keys on reboot.
 Don't generate new ssh key for each box because it will be override by coreos' update-ssh-keys on reboot.

xueshanf/coreos-docker-dev,xueshanf/coreos-docker-dev,xuwang/coreos-docker-dev,xuwang/coreos-docker-dev,xuwang/coreos-docker-dev,xueshanf/coreos-docker-dev,remoe/coreos-docker-dev,xueshanf/coreos-docker-dev,remoe/coreos-docker-dev,xueshanf/coreos-docker-dev,remoe/coreos-docker-dev,remoe/coreos-docker-dev,xuwang/coreos-docker-dev